AT89C5131A-PLTIL Atmel, AT89C5131A-PLTIL Datasheet - Page 148

• Manufacturer Part Number: AT89C5131A-PLTIL
• Description: IC 8051 MCU FLASH 32K USB 48QFN
• Manufacturer: Atmel
• Series: AT89C513xr

Specifications of AT89C5131A-PLTIL

• Core Processor: C52X2
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: LED, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-05 - KIT STARTER FOR AT89C5131
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89C5131-PLTIL

Reset
Introduction
Reset Input
148
AT89C5131A-L
The reset sources are: Power Management, Hardware Watchdog, PCA Watchdog and
Reset input.
Figure 72. Reset schematic
The Reset input can be used to force a reset pulse longer than the internal reset con-
trolled by the Power Monitor. RST input has a pull-up resistor allowing power-on reset
by simply connecting an external capacitor to V
and input characteristics are discussed in the Section “DC Characteristics” of the
AT89C5131A-L datasheet.
Figure 73. Reset Circuitry and Power-On Reset
RST
RST
Watchdog
Watchdog
Hardware
Monitor
Power
PCA
a. RST input circuitry
VCC
To internal reset
SS
as shown in Figure 73. Resistor value
b. Power-on Reset
Internal Reset
VSS
+
4338F–USB–08/07
RST